<template>
  <div class="icons">
    <swiper :options="swiperOption" v-if="showSwiper">
      <swiper-slide v-for="(page, index) in pages" :key="index">
        <div
          class="icon"
          v-for="item in page"
          :key="item.id"
        >
          <div class="icon-img">
            <img class="icon-img-content"
          :src="item.imgUrl" alt="">
          </div>
          <p class="icon-desc">{{item.desc}}</p>
        </div>
      </swiper-slide>
      <div class="swiper-pagination"  slot="pagination"></div>
    </swiper>
  </div>
</template>

<script>
export default {
  name: 'HomeIcons',
  props: {
    list: Array
  },
  data () {
    return {
      swiperOption: {
        pagination: '.swiper-pagination',
        loop: true
      }
    }
  },
  computed: {
    pages () {
      const pages = []
      this.list.forEach((item, index) => {
        const page = Math.floor(index / 8)
        if (!pages[page]) { // 当pages[index]没有数据时就会进入
          pages[page] = [] // 使pages[index]里变成一个数组去接受8个数据
        }
        pages[page].push(item)
      })
      return pages
    },
    showSwiper () {
      return this.list.length
    }
  }
}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  @import '~styles/mixins.styl'
  .icons >>> .swiper-container
    height 0
    padding-bottom 50%
    margin-bottom .2rem
  .icons >>> .swiper-pagination
    bottom 0
  .icons >>> .swiper-pagination-bullet
    width .12rem
    height .12rem
    margin .06rem
  .icon
    position relative
    float left
    width 25%
    height 0
    padding-bottom 21.5%
    .icon-img
      position absolute
      top 0
      left 0
      right 0
      bottom .28rem
      // box-sizing border-box
      padding .16rem
      .icon-img-content
        display block
        margin 0 auto
        height 100%
    .icon-desc
      position absolute
      left 0
      right 0
      bottom 0
      height .28rem
      line-height .28rem
      color $darkTextColor
      text-align center
      ellipsis()
</style>
